Security Expert Uncovers Serious iPhone SMS Vulnerability

Article by George Norman (Cybersecurity Editor)

on 06 Jul 2009

Security expert Charlie Miller, which you might remember from the PWN2OWN competition where he managed to hack into Apple’s Safari in about 10 seconds, has uncovered a rather nasty security vulnerability affecting the iPhone. The vulnerability that Charlie Miller uncovered refers to the manner in which the iPhone handles text messages (SMS), which in turn could grant a person with malicious intent to gain root access to the device.

Unfortunately for those of you that want more details on the matter, Charlie Miller could not provide in-depth details on the vulnerability he uncovered, for obvious security reasons. If the details were to be released before Apple has time to work on a fix then anyone could potentially exploit this SMS vulnerability.

What we do know is this: the iPhone handles SMS messages in a dangerous manner that could allow a person with malicious intent to remotely install and run unsigned software code with root access on the device. The attacker could for example send software code on the iPhone via SMS and thanks to this malicious code the attacker could turn on the device’s microphone and listen in to your conversation, could turn on the device’s GPS and know precisely where you are, or could add the iPhone to a botnet or distributed denial of service attack.

It sounds gloom, I know, but there is one upside. Charlie Miller does not have an exploit for this vulnerability so far, just a very suspicious crash (he can crash part of the device and temporarily disconnect it from the network). On top of that Apple is reportedly already aware of this issue and is currently working with Miller on a patch. The fix is supposed to be rolled out later this month, before Charlie Miller is due to make a detailed presentation on how to “inject SMS messages into iPhone, Android, and Windows Mobile devices” at the Black Hat 2009 event (25th through 30th of July, Caesar’s Palace, Las Vegas).

In related news, we already know that Apple is working on the iPhone OS 3.1 update. Let’s just hope that alongside the fixes and improvements it has to offer, a fix for this SMS vulnerability is also included.


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